Daily Bonus

dailybonus.lua

-- For info go to the following web address:
-- https://developer.coronalabs.com/code/daily-bonus

prefs = require "preference_library"

local function checkForSinglePlayerBonus( ) 
    local lastDayNum = prefs.getValue( "lastDayNum" ) or 0
    local lastMonthNum = prefs.getValue( "lastMonthNum" ) or 0
    local date = os.date( "*t" )    
    local thisDayNum = (date.day)   
    local thisMonthNum = (date.month)
    if thisDayNum == lastDayNum then
        if thisMonthNum ~= lastMonthNum
        -- same day, different month!
        bonusIndex = 1
        end
    else
        if thisDayNum == lastDayNum+1 then 
            -- increase the bonus
            bonusIndex = bonusIndex + 1
            if bonusIndex == 6 then
                bonusIndex = 1
            end
        else 
            -- more than a day since the last session, reset the daily bonus
            bonusIndex = 1
        end  
    end
    prefs.save( "bonusIndex", bonusIndex )
    prefs.save("lastDayNum", thisDayNum)
    prefs.save("lastMonthNum", thisMonthNum)
end    

Missing a "then" at the end of line 13.